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BrainyAlcumusWizard

Answer: 18

Step-by-step explanation: The formula for circumference is 2piR. Since 2piR = 36pi, you can cancel out the pi's which makes it 2r = 36. Divide by 2 on both sides and you get r = 18.

Ruilin0715
A. 18cm


Circumference=2(pi)r
36=2r
r=18

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